What is the cheapest month to book a flight from London Stansted Airport to Washington, D.C. Dulles Intl Airport?

Currently, January is the cheapest month in which you can book a flight from London Stansted Airport to Washington, D.C. Dulles Intl Airport (average of £599). Flying from London Stansted Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest day to fly from London Stansted Airport to Washington, D.C. Dulles Intl Airport?

Travellers seeking maximum savings on their London Stansted Airport to Washington, D.C. Dulles Intl Airport flight should consider departing on Monday mornings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

What is the cheapest time of day to fly from STN to IAD?

One of the essential ways to save on airfare from London Stansted Airport to Washington, D.C. Dulles Intl Airport is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the morning could potentially save you up to 19% on airfare.

Can I find deals for flights from Stansted to Dulles Intl that include hotel bookings?

Yes. In addition to deals on Stansted to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Stansted to Dulles Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Stansted to Dulles Intl.

Can I find deals for business class flights from Stansted to Dulles Intl?

Yes. Cheapflights offers flight deals from Stansted to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£370+ Cheap Flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport

Cheap flight deals from Stansted to Dulles Intl

Round-trip from	£392
One-way from	£370
Popular in	July
Cheapest in	February
Average price	£488

13/11-30/11
4 total stops
46h 25m total
London to Washington, D.C.

Search Deals

12/1
1 total stop
31h 05m total
London to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (£48 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Find flight deals from Stansted to Dulles Intl

Cheapest flights from Stansted to Dulles Intl
Explore the most affordable flight options available from Stansted to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Thu 13/1121:20STN - IAD

2 stops26h 10mMultiple Airlines

Sun 30/1119:40IAD - STN

2 stops20h 15mMultiple Airlines

Deal found 16/9£392

Mon 10/1106:10STN - IAD

2 stops17h 20mMultiple Airlines

Fri 14/1119:40IAD - STN

2 stops20h 05mMultiple Airlines

Deal found 15/9£394

Thu 23/1009:20STN - IAD

1 stop11h 30mMultiple Airlines

Sun 26/1022:00IAD - STN

1 stop18h 05mMultiple Airlines

Deal found 15/9£402

Fri 31/1013:30STN - IAD

2 stops32h 10mMultiple Airlines

Fri 7/1116:25IAD - STN

2 stops19h 10mMultiple Airlines

Deal found 16/9£407

Thu 30/1006:30STN - IAD

2 stops17h 00mMultiple Airlines

Wed 5/1119:40IAD - STN

2 stops20h 25mMultiple Airlines

Deal found 15/9£409

Thu 16/1013:10STN - IAD

2 stops32h 05mMultiple Airlines

Sun 19/1020:45IAD - STN

2 stops19h 30mMultiple Airlines

Deal found 16/9£411

Thu 2/1008:15STN - IAD

1 stop12h 35mMultiple Airlines

Mon 13/1017:20IAD - STN

1 stop9h 30mMultiple Airlines

Deal found 16/9£415

Fri 3/1006:40STN - IAD

1 stop14h 10mMultiple Airlines

Mon 6/1020:25IAD - STN

1 stop14h 40mMultiple Airlines

Deal found 15/9£416

Wed 1/1017:20STN - IAD

2 stops25h 10mMultiple Airlines

Thu 16/1020:45IAD - STN

2 stops16h 15mMultiple Airlines

Deal found 15/9£418

Fri 3/1008:15STN - IAD

1 stop12h 35mMultiple Airlines

Sun 5/1020:25IAD - STN

1 stop11h 30mMultiple Airlines

Deal found 16/9£419

Best flights from Stansted to Dulles Intl
Discover carefully curated flight deals from Stansted to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 September 2025.

Fri 31/1006:30STN - IAD

1 stop14h 05mMultiple Airlines

Fri 7/1121:00IAD - STN

1 stop14h 35mMultiple Airlines

Deal found 16/9£413

Thu 2/1008:15STN - IAD

1 stop12h 35mMultiple Airlines

Mon 13/1017:20IAD - STN

1 stop9h 30mMultiple Airlines

Deal found 16/9£415

Fri 3/1006:40STN - IAD

1 stop14h 10mMultiple Airlines

Mon 6/1020:25IAD - STN

1 stop14h 40mMultiple Airlines

Deal found 15/9£416

Sun 5/1008:15STN - IAD

2 stops16h 05mMultiple Airlines

Sat 11/1020:30IAD - STN

2 stops22h 50mMultiple Airlines

Deal found 16/9£423

Wed 15/1007:30STN - IAD

2 stops19h 40mMultiple Airlines

Thu 23/1020:30IAD - STN

2 stops18h 50mMultiple Airlines

Deal found 16/9£433

Wed 5/1107:40STN - IAD

2 stops18h 20mMultiple Airlines

Sat 8/1117:30IAD - STN

2 stops24h 25mMultiple Airlines

Deal found 16/9£438

Sun 2/1111:55STN - IAD

2 stops32h 20mMultiple Airlines

Thu 13/1117:30IAD - STN

2 stops25h 10mMultiple Airlines

Deal found 15/9£444

Tue 30/921:25STN - IAD

2 stops23h 55mMultiple Airlines

Thu 9/1021:20IAD - STN

2 stops20h 05mMultiple Airlines

Deal found 16/9£449

Thu 9/1006:40STN - IAD

2 stops19h 10mMultiple Airlines

Tue 14/1017:00IAD - STN

2 stops26h 10mMultiple Airlines

Deal found 15/9£453

Thu 16/1006:40STN - IAD

2 stops19h 10mMultiple Airlines

Thu 23/1022:20IAD - STN

2 stops20h 00mMultiple Airlines

Deal found 16/9£459

Tue 25/1117:00STN - IAD

3 stops32h 54mMultiple Airlines

Tue 2/1220:30IAD - STN

2 stops18h 10mMultiple Airlines

Deal found 14/9£463

Wed 15/1022:10STN - IAD

2 stops22h 10mMultiple Airlines

Wed 22/1022:20IAD - STN

2 stops19h 25mMultiple Airlines

Deal found 16/9£477

Last-minute flights from Stansted to Dulles Intl
Discover last-minute flight deals from Stansted to Dulles Intl. Data last updated 17 September 2025 and is based on user searches.

Wed 1/1017:20STN - IAD

2 stops25h 10mMultiple Airlines

Thu 16/1020:45IAD - STN

2 stops16h 15mMultiple Airlines

Deal found 15/9£418

Thu 2/1008:15STN - IAD

1 stop12h 35mMultiple Airlines

Mon 13/1017:20IAD - STN

1 stop9h 30mMultiple Airlines

Deal found 16/9£415

Fri 3/1006:40STN - IAD

1 stop14h 10mMultiple Airlines

Mon 6/1020:25IAD - STN

1 stop14h 40mMultiple Airlines

Deal found 15/9£416

Fri 3/1008:15STN - IAD

1 stop12h 35mMultiple Airlines

Sun 5/1020:25IAD - STN

1 stop11h 30mMultiple Airlines

Deal found 16/9£419

Sun 5/1008:15STN - IAD

2 stops16h 05mMultiple Airlines

Sat 11/1020:30IAD - STN

2 stops22h 50mMultiple Airlines

Deal found 16/9£423

Thu 16/1013:10STN - IAD

2 stops32h 05mMultiple Airlines

Sun 19/1020:45IAD - STN

2 stops19h 30mMultiple Airlines

Deal found 16/9£411

Thu 16/1008:15STN - IAD

1 stop12h 35mMultiple Airlines

Thu 23/1017:20IAD - STN

1 stop11h 25mMultiple Airlines

Deal found 16/9£425

Thu 23/1009:20STN - IAD

1 stop11h 30mMultiple Airlines

Sun 26/1022:00IAD - STN

1 stop18h 05mMultiple Airlines

Deal found 15/9£402

Thu 30/1006:30STN - IAD

2 stops17h 00mMultiple Airlines

Wed 5/1119:40IAD - STN

2 stops20h 25mMultiple Airlines

Deal found 15/9£409

Fri 31/1013:30STN - IAD

2 stops32h 10mMultiple Airlines

Fri 7/1116:25IAD - STN

2 stops19h 10mMultiple Airlines

Deal found 16/9£407

One-way flights from Stansted to Dulles Intl
Search for one-way flight options from Stansted to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 17 September 2025.

Mon 12/114:25STN - IAD

1 stop31h 05mMultiple Airlines

Deal found 15/9£370

Fri 10/1018:25STN - IAD

2 stops32h 45mMultiple Airlines

Deal found 13/9£372

Mon 19/119:55STN - IAD

1 stop25h 35mMultiple Airlines

Deal found 14/9£373

Fri 24/1006:40STN - IAD

1 stop14h 10mMultiple Airlines

Deal found 15/9£374

Mon 27/1006:30STN - IAD

1 stop14h 05mMultiple Airlines

Deal found 14/9£375

Fri 26/906:45STN - IAD

2 stops20h 25mMultiple Airlines

Deal found 16/9£375

Sat 11/1022:00STN - IAD

3 stops26h 05mMultiple Airlines

Deal found 13/9£376

Tue 23/922:35STN - IAD

1 stop22h 15mMultiple Airlines

Deal found 15/9£377

Thu 2/1008:15STN - IAD

1 stop12h 35mMultiple Airlines

Deal found 15/9£378

Wed 1/1019:50STN - IAD

1 stop25h 00mMultiple Airlines

Deal found 14/9£378

Thu 9/1008:15STN - IAD

1 stop12h 35mMultiple Airlines

Deal found 15/9£380

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Fri 31/10

06:30-16:35

1 stop14h 05m

Washington, D.C. Dulles Intl

Fri 7/11

21:00-16:35

1 stop14h 35m

£413

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 2/10

08:15-15:50

1 stop12h 35m

Washington, D.C. Dulles Intl

Mon 13/10

17:20-07:50

1 stop9h 30m

£415

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Fri 3/10

06:40-15:50

1 stop14h 10m

Washington, D.C. Dulles Intl

Mon 6/10

20:25-16:05

1 stop14h 40m

£416

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sun 5/10

08:15-19:20

2 stops16h 05m

Washington, D.C. Dulles Intl

Sat 11/10

20:30-00:20

2 stops22h 50m

£423

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 15/10

07:30-22:10

2 stops19h 40m

Washington, D.C. Dulles Intl

Thu 23/10

20:30-20:20

2 stops18h 50m

£433

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 5/11

07:40-21:00

2 stops18h 20m

Washington, D.C. Dulles Intl

Sat 8/11

17:30-22:55

2 stops24h 25m

£438

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sun 2/11

11:55-15:15

2 stops32h 20m

Washington, D.C. Dulles Intl

Thu 13/11

17:30-23:40

2 stops25h 10m

£444

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Tue 30/9

21:25-16:20

2 stops23h 55m

Washington, D.C. Dulles Intl

Thu 9/10

21:20-22:25

2 stops20h 05m

£449

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 9/10

06:40-20:50

2 stops19h 10m

Washington, D.C. Dulles Intl

Tue 14/10

17:00-00:10

2 stops26h 10m

£453

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 16/10

06:40-20:50

2 stops19h 10m

Washington, D.C. Dulles Intl

Thu 23/10

22:20-23:20

2 stops20h 00m

£459

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 24 results

Best time to book a flight from Stansted to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Stansted with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Can I find deals for flights from Stansted to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Stansted to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Stansted to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Stansted to Dulles Intl.
Can I find deals for business class flights from Stansted to Dulles Intl?
Yes. Cheapflights offers flight deals from Stansted to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London Stansted Airport to Washington, D.C. Dulles Intl Airport?
Currently, January is the cheapest month in which you can book a flight from London Stansted Airport to Washington, D.C. Dulles Intl Airport (average of £599). Flying from London Stansted Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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How does Cheapflights help users find flights from Stansted to Dulles Intl?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Dulles Intl from Stansted today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Stansted to Dulles Intl?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Dulles Intl from Stansted.

Can Cheapflights find flights from Stansted to Dulles Intl with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Stansted to Dulles Intl flexibly with Cheapflights today.

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Cheap flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport from £370

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/1. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Stansted to Dulles Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Stansted to Dulles Intl

Cheapest flights from Stansted to Dulles IntlExplore the most affordable flight options available from Stansted to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Explore the most affordable flight options available from Stansted to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Best time to book a flight from Stansted to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Stansted with our price prediction graph.

Related info for your journey

Find useful and relevant information for your journey from Stansted to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

Can I find deals for flights from Stansted to Dulles Intl that include hotel bookings?

How can I find direct flights from Stansted to Dulles Intl?

Can I find deals for business class flights from Stansted to Dulles Intl?

What is the cheapest month to book a flight from London Stansted Airport to Washington, D.C. Dulles Intl Airport?

Travelling to a place near Washington, D.C. Dulles Intl Airport?

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Alternative routes for Stansted to Dulles Intl

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How does Cheapflights help users find flights from Stansted to Dulles Intl?

Why should you use Cheapflights to find cheap flight tickets from Stansted to Dulles Intl?

Can Cheapflights find flights from Stansted to Dulles Intl with no change fees?

Can Cheapflights notify me if prices for flights from Stansted to Dulles Intl become cheaper?

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Cheapest flights from Stansted to Dulles Intl
Explore the most affordable flight options available from Stansted to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.